<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 400px;
            height: 400px;
            margin: 100px auto;
            border-radius: 50%;
            overflow: hidden;
            animation: anim 5s linear infinite;
        }
        @keyframes anim{
            0%{
                transform: rotate(0deg);
            }
            100%{
                transform: rotate(360deg);
            }
        }
    </style>
</head>
<body>
    <div><img src="img/u=3717537756,110782254&fm=26&gp=0.jpg" alt=""></div>
</body>
</html>